Method and equipment for production of laminated metal sheet

Details Method and equipment for production of laminated metal sheet Method and equipment for production of laminated metal sheet

B - Operations, Transporting

32

B

B32B 15/08 (2006.01) B21B 1/26 (2006.01)

Patent

CA 2236589

When producing a laminated metal sheet, the air bubbles taken in when laminating can be lessened so that a laminated metal sheet with low rate of air bubbles can be obtained. For this purpose, in a production method of a laminated metal sheet comprising the steps of laminating of plastic film 2 on at least one side of a metal sheet strip 1, the plastic film is heated to a temperature of between the glass transition temperature of the plastic film and a temperature at which the thermal shrinkage of the film attains 3 % when the plastic film is kept for 30 minutes at a constant temperature, and just after the heating, the plastic film is brought into pressure contact with the metal sheet, by which laminated metal sheet in which air bubbles are hard to be taken in when laminating, and the rate of air bubbles is low can be obtained.

Procédé permettant de produire une tôle plaquée dans laquelle l'air ne risque pas d'être retenu sous une couche plastique, ce qui permet de diminuer la porosité. Pour recouvrir au moins une face d'un feuillard (1) avec une couche plastique (2), on chauffe cette dernière (2) jusqu'à une température comprise entre le point de transition vitreuse de la couche plastique et une température à laquelle le retrait par refroidissement de la couche atteint 3 % quand la couche est maintenue 30 mn à température constante. Puis on met la couche plastique sous contrainte de traction en manocontact avec la couche métallique. De cette manière, l'air est difficilement piégé et on obtient une tôle plaquée ayant une faible porosité.

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